This story contains oral, anal, incest, dominance, and submissive themes.
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Rick woke up in the middle of the night in tired confusion when he heard a muffled cry. Marie wasn't by his side. He groaned and got up, rubbing sleep from his eyes. What was she up to now? Rick had already decided her needed to talk with Joan alone at some point, just to get his bearings. He heard creaking about the house so he knew someone was moving around. He got up to investigate.
His boxers clothed his half erect cock as he wondered though the dark home in a half wakening daze. He began to notice a familiar sound as he walked across the hallway. It was the sound that had woken him. There was a subtle whimpering coming from Joans room. A crack of light pierced the shadows. He peaked in curiously.
"Are you close?" He heard Marie whisper.
"Hmm!" He heard the whimper again he slightly cracked the door open and saw two lithe lower limbs writhing on the ground. They were clothed in pajama bottoms. He cracked it more as saw a round rear end bent over the bed, and a brightly colored object being pounded in and out by a skilled and determined hand. The waistband was only halfway down her round rear. "M-Mom!" He heard, "I-It's too big!" Joan whimpered.
"That's why we're training honey." As the door slipped more he saw Marie in her bedclothes leaning over above her daughter, one hand pressing her head down into the covers to muffle her whines and the other twisting and thrusting the toy in her daughter rump. "The sooner you get used to this, the sooner you and Rick can make each other happy. Don't you want that?"
"Y-Yes!" She cried into the sheets. "I want him so badly!"
"I know dear." She her pace was slow and loving. "Now, remember to warn me before you cum." She stressed. "I want Rick to be the first to make you cum like this,"
"Yes." Joan moaned. "Rick-" Marie stopped the fucking and slapped her ass quickly, "Ah! I mean, Dad. Daddy. I want Daddy inside me so badly!"
Rick gulped as Marie smiled and returned to pumping her daughter, "That's right. We all make mistakes dear, no reason to fret." Her daughter returned to her regular rhythm of moans and whines, "Just like when you were touching yourself last week, and accidently got yourself off." Marie went a bit deeper and harder to make her disapproval known, "I wanted Rick to have your first you know. Your first orgasm ever."
"I'm sorry!" Joan cried again. "It wont happen again!"
"I forgive you." Marie ran her fingers through her daughter hair as she held her down. "But we can't change what's been done."
"I was thinking of him!" Joan begged. "The whole time!"
"I know honey, I know." Joan arched her back. "Are you close now?"
"Yes mommy!" Joan nodded, "Yes!"
"Good." Marie stopped and Joan whimpered. "I want you to really want it." Marie whispered to her daughter as the toy left her.
"When?" Joan wiggled her ass as her mother lifted her panties and bottoms up. She turned and sat down with an exited wince on her sore bottom. "W-When can I do it with R-" She tensed, "Daddy?"
"Soon." Marie caressed her daughters face. "But you aren't ready yet. You saw how big he was, right?" Joan nodded with grim understanding. "At least another week of training I think." Marie gave her a kiss on the forehead. "Maybe sooner if you keep training by yourself."
The door creaked and both of them turned to see Rick staring in morbid fascination with his ridged cock fighting it's way out of his boxers. "Uh." He blinked. Joan looked mortified. Marie blushed as well.
"Rick!" Marie stood suddenly. "How long have you been standing there?"
Rick considered lying, but this family seemed very open, and he'd hate to ruin that, "A while. I guess. I've been watching for a while."